1 /* $NetBSD: resolv.h,v 1.31 2005/12/26 19:01:47 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1987, 1989 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 34 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. 35 * 36 * Permission to use, copy, modify, and distribute this software for any 37 * purpose with or without fee is hereby granted, provided that the above 38 * copyright notice and this permission notice appear in all copies. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 41 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 42 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 43 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 44 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 45 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 46 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 47 */ 48 49 /* 50 * @(#)resolv.h 8.1 (Berkeley) 6/2/93 51 * Id: resolv.h,v 1.7.2.11.4.2 2004/06/25 00:41:05 marka Exp 52 */ 53 54 #ifndef _RESOLV_PRIVATE_H_ 55 #define _RESOLV_PRIVATE_H_ 56 57 #include <sys/cdefs.h> 58 59 #include <resolv.h> 60 #include "resolv_static.h" 61 #include "resolv_params.h" 62 #include "resolv_stats.h" 63 #include <net/if.h> 64 #include <time.h> 65 66 /* Despite this file's name, it's part of libresolv. On Android, that means it's part of libc :-( */ 67 #pragma GCC visibility push(default) 68 69 // Linux defines MAXHOSTNAMELEN as 64, while the domain name limit in 70 // RFC 1034 and RFC 1035 is 255 octets. 71 #ifdef MAXHOSTNAMELEN 72 #undef MAXHOSTNAMELEN 73 #endif 74 #define MAXHOSTNAMELEN 256 75 76 /* 77 * Revision information. This is the release date in YYYYMMDD format. 78 * It can change every day so the right thing to do with it is use it 79 * in preprocessor commands such as "#if (__RES > 19931104)". Do not 80 * compare for equality; rather, use it to determine whether your resolver 81 * is new enough to contain a certain feature. 82 */ 83 84 #define __RES 20030124 85 86 /* 87 * This used to be defined in res_query.c, now it's in herror.c. 88 * [XXX no it's not. It's in irs/irs_data.c] 89 * It was 90 * never extern'd by any *.h file before it was placed here. For thread 91 * aware programs, the last h_errno value set is stored in res->h_errno. 92 * 93 * XXX: There doesn't seem to be a good reason for exposing RES_SET_H_ERRNO 94 * (and __h_errno_set) to the public via <resolv.h>. 95 * XXX: __h_errno_set is really part of IRS, not part of the resolver. 96 * If somebody wants to build and use a resolver that doesn't use IRS, 97 * what do they do? Perhaps something like 98 * #ifdef WANT_IRS 99 * # define RES_SET_H_ERRNO(r,x) __h_errno_set(r,x) 100 * #else 101 * # define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x)) 102 * #endif 103 */ 104 105 #define RES_SET_H_ERRNO(r,x) (h_errno = (r)->res_h_errno = (x)) 106 struct __res_state; /* forward */ 107 108 /* 109 * Resolver configuration file. 110 * Normally not present, but may contain the address of the 111 * initial name server(s) to query and the domain search list. 112 */ 113 114 #ifndef _PATH_RESCONF 115 #ifdef ANDROID_CHANGES 116 #define _PATH_RESCONF "/etc/ppp/resolv.conf" 117 #else 118 #define _PATH_RESCONF "/etc/resolv.conf" 119 #endif 120 #endif 121 122 typedef enum { res_goahead, res_nextns, res_modified, res_done, res_error } 123 res_sendhookact; 124 125 typedef res_sendhookact (*res_send_qhook)(struct sockaddr * const *, 126 const u_char **, int *, 127 u_char *, int, int *); 128 129 typedef res_sendhookact (*res_send_rhook)(const struct sockaddr *, 130 const u_char *, int, u_char *, 131 int, int *); 132 133 struct res_sym { 134 int number; /* Identifying number, like T_MX */ 135 const char * name; /* Its symbolic name, like "MX" */ 136 const char * humanname; /* Its fun name, like "mail exchanger" */ 137 }; 138 139 /* 140 * Global defines and variables for resolver stub. 141 */ 142 #define MAXDFLSRCH 3 /* # default domain levels to try */ 143 #define LOCALDOMAINPARTS 2 /* min levels in name that is "local" */ 144 145 #define RES_TIMEOUT 5 /* min. seconds between retries */ 146 #define MAXRESOLVSORT 10 /* number of net to sort on */ 147 #define RES_MAXNDOTS 15 /* should reflect bit field size */ 148 #define RES_MAXRETRANS 30 /* only for resolv.conf/RES_OPTIONS */ 149 #define RES_MAXRETRY 5 /* only for resolv.conf/RES_OPTIONS */ 150 #define RES_DFLRETRY 2 /* Default #/tries. */ 151 #define RES_MAXTIME 65535 /* Infinity, in milliseconds. */ 152 153 struct __res_state_ext; 154 155 struct __res_state { 156 unsigned netid; /* NetId: cache key and socket mark */ 157 int retrans; /* retransmission time interval */ 158 int retry; /* number of times to retransmit */ 159 #ifdef sun 160 u_int options; /* option flags - see below. */ 161 #else 162 u_long options; /* option flags - see below. */ 163 #endif 164 int nscount; /* number of name servers */ 165 struct sockaddr_in 166 nsaddr_list[MAXNS]; /* address of name server */ 167 #define nsaddr nsaddr_list[0] /* for backward compatibility */ 168 u_short id; /* current message id */ 169 char *dnsrch[MAXDNSRCH+1]; /* components of domain to search */ 170 char defdname[256]; /* default domain (deprecated) */ 171 #ifdef sun 172 u_int pfcode; /* RES_PRF_ flags - see below. */ 173 #else 174 u_long pfcode; /* RES_PRF_ flags - see below. */ 175 #endif 176 unsigned ndots:4; /* threshold for initial abs. query */ 177 unsigned nsort:4; /* number of elements in sort_list[] */ 178 char unused[3]; 179 struct { 180 struct in_addr addr; 181 uint32_t mask; 182 } sort_list[MAXRESOLVSORT]; 183 #ifdef __OLD_RES_STATE 184 char lookups[4]; 185 #else 186 res_send_qhook qhook; /* query hook */ 187 res_send_rhook rhook; /* response hook */ 188 int res_h_errno; /* last one set for this context */ 189 unsigned _mark; /* If non-0 SET_MARK to _mark on all request sockets */ 190 int _vcsock; /* PRIVATE: for res_send VC i/o */ 191 u_int _flags; /* PRIVATE: see below */ 192 u_int _pad; /* make _u 64 bit aligned */ 193 union { 194 /* On an 32-bit arch this means 512b total. */ 195 char pad[72 - 4*sizeof (int) - 2*sizeof (void *)]; 196 struct { 197 uint16_t nscount; 198 uint16_t nstimes[MAXNS]; /* ms. */ 199 int nssocks[MAXNS]; 200 struct __res_state_ext *ext; /* extention for IPv6 */ 201 } _ext; 202 } _u; 203 #endif 204 struct res_static rstatic[1]; 205 }; 206 207 typedef struct __res_state *res_state; 208 209 /* Retrieve a local copy of the stats for the given netid. The buffer must have space for 210 * MAXNS __resolver_stats. Returns the revision id of the resolvers used. 211 */ 212 __LIBC_HIDDEN__ 213 extern int 214 _resolv_cache_get_resolver_stats( unsigned netid, struct __res_params* params, 215 struct __res_stats stats[MAXNS]); 216 217 /* Add a sample to the shared struct for the given netid and server, provided that the 218 * revision_id of the stored servers has not changed. 219 */ 220 __LIBC_HIDDEN__ 221 extern void 222 _resolv_cache_add_resolver_stats_sample( unsigned netid, int revision_id, int ns, 223 const struct __res_sample* sample, int max_samples); 224 225 /* End of stats related definitions */ 226 227 union res_sockaddr_union { 228 struct sockaddr_in sin; 229 #ifdef IN6ADDR_ANY_INIT 230 struct sockaddr_in6 sin6; 231 #endif 232 #ifdef ISC_ALIGN64 233 int64_t __align64; /* 64bit alignment */ 234 #else 235 int32_t __align32; /* 32bit alignment */ 236 #endif 237 char __space[128]; /* max size */ 238 }; 239 240 /* 241 * Resolver flags (used to be discrete per-module statics ints). 242 */ 243 #define RES_F_VC 0x00000001 /* socket is TCP */ 244 #define RES_F_CONN 0x00000002 /* socket is connected */ 245 #define RES_F_EDNS0ERR 0x00000004 /* EDNS0 caused errors */ 246 #define RES_F__UNUSED 0x00000008 /* (unused) */ 247 #define RES_F_LASTMASK 0x000000F0 /* ordinal server of last res_nsend */ 248 #define RES_F_LASTSHIFT 4 /* bit position of LASTMASK "flag" */ 249 #define RES_GETLAST(res) (((res)._flags & RES_F_LASTMASK) >> RES_F_LASTSHIFT) 250 251 /* res_findzonecut2() options */ 252 #define RES_EXHAUSTIVE 0x00000001 /* always do all queries */ 253 #define RES_IPV4ONLY 0x00000002 /* IPv4 only */ 254 #define RES_IPV6ONLY 0x00000004 /* IPv6 only */ 255 256 /* 257 * Resolver options (keep these in synch with res_debug.c, please) 258 */ 259 #define RES_INIT 0x00000001 /* address initialized */ 260 #define RES_DEBUG 0x00000002 /* print debug messages */ 261 #define RES_AAONLY 0x00000004 /* authoritative answers only (!IMPL)*/ 262 #define RES_USEVC 0x00000008 /* use virtual circuit */ 263 #define RES_PRIMARY 0x00000010 /* query primary server only (!IMPL) */ 264 #define RES_IGNTC 0x00000020 /* ignore trucation errors */ 265 #define RES_RECURSE 0x00000040 /* recursion desired */ 266 #define RES_DEFNAMES 0x00000080 /* use default domain name */ 267 #define RES_STAYOPEN 0x00000100 /* Keep TCP socket open */ 268 #define RES_DNSRCH 0x00000200 /* search up local domain tree */ 269 #define RES_INSECURE1 0x00000400 /* type 1 security disabled */ 270 #define RES_INSECURE2 0x00000800 /* type 2 security disabled */ 271 #define RES_NOALIASES 0x00001000 /* shuts off HOSTALIASES feature */ 272 #define RES_USE_INET6 0x00002000 /* use/map IPv6 in gethostbyname() */ 273 #define RES_ROTATE 0x00004000 /* rotate ns list after each query */ 274 #define RES_NOCHECKNAME 0x00008000 /* do not check names for sanity. */ 275 #define RES_KEEPTSIG 0x00010000 /* do not strip TSIG records */ 276 #define RES_BLAST 0x00020000 /* blast all recursive servers */ 277 #define RES_NOTLDQUERY 0x00100000 /* don't unqualified name as a tld */ 278 #define RES_USE_DNSSEC 0x00200000 /* use DNSSEC using OK bit in OPT */ 279 /* #define RES_DEBUG2 0x00400000 */ /* nslookup internal */ 280 /* KAME extensions: use higher bit to avoid conflict with ISC use */ 281 #define RES_USE_DNAME 0x10000000 /* use DNAME */ 282 #define RES_USE_EDNS0 0x40000000 /* use EDNS0 if configured */ 283 #define RES_NO_NIBBLE2 0x80000000 /* disable alternate nibble lookup */ 284 285 #define RES_DEFAULT (RES_RECURSE | RES_DEFNAMES | \ 286 RES_DNSRCH | RES_NO_NIBBLE2) 287 288 /* 289 * Resolver "pfcode" values. Used by dig. 290 */ 291 #define RES_PRF_STATS 0x00000001 292 #define RES_PRF_UPDATE 0x00000002 293 #define RES_PRF_CLASS 0x00000004 294 #define RES_PRF_CMD 0x00000008 295 #define RES_PRF_QUES 0x00000010 296 #define RES_PRF_ANS 0x00000020 297 #define RES_PRF_AUTH 0x00000040 298 #define RES_PRF_ADD 0x00000080 299 #define RES_PRF_HEAD1 0x00000100 300 #define RES_PRF_HEAD2 0x00000200 301 #define RES_PRF_TTLID 0x00000400 302 #define RES_PRF_HEADX 0x00000800 303 #define RES_PRF_QUERY 0x00001000 304 #define RES_PRF_REPLY 0x00002000 305 #define RES_PRF_INIT 0x00004000 306 #define RES_PRF_TRUNC 0x00008000 307 /* 0x00010000 */ 308 309 /* Things involving an internal (static) resolver context. */ 310 __BEGIN_DECLS 311 312 __LIBC_HIDDEN__ extern struct __res_state *__res_get_state(void); 313 __LIBC_HIDDEN__ extern void __res_put_state(struct __res_state *); 314 315 #ifndef ANDROID_CHANGES 316 /* 317 * Source and Binary compatibility; _res will not work properly 318 * with multi-threaded programs. 319 */ 320 extern struct __res_state *__res_state(void); 321 #define _res (*__res_state()) 322 #endif 323 324 __END_DECLS 325 326 #ifndef __BIND_NOSTATIC 327 #define fp_nquery __fp_nquery 328 #define fp_query __fp_query 329 #define hostalias __hostalias 330 #define p_query __p_query 331 #define res_close __res_close 332 #define res_opt __res_opt 333 #define res_isourserver __res_isourserver 334 #define res_querydomain __res_querydomain 335 #define res_send __res_send 336 #define res_sendsigned __res_sendsigned 337 338 #ifdef BIND_RES_POSIX3 339 #define dn_expand __dn_expand 340 #define res_init __res_init 341 #define res_query __res_query 342 #define res_search __res_search 343 #define res_mkquery __res_mkquery 344 #endif 345 346 __BEGIN_DECLS 347 void fp_nquery(const u_char *, int, FILE *); 348 void fp_query(const u_char *, FILE *); 349 const char * hostalias(const char *); 350 void p_query(const u_char *); 351 void res_close(void); 352 int res_init(void); 353 __LIBC_HIDDEN__ int res_opt(int, u_char *, int, int); 354 int res_isourserver(const struct sockaddr_in *); 355 int res_mkquery(int, const char *, int, int, const u_char *, int, const u_char *, u_char *, int); 356 int res_query(const char *, int, int, u_char *, int); 357 int res_querydomain(const char *, const char *, int, int, u_char *, int); 358 int res_search(const char *, int, int, u_char *, int); 359 int res_send(const u_char *, int, u_char *, int); 360 int res_sendsigned(const u_char *, int, ns_tsig_key *, u_char *, int); 361 __END_DECLS 362 #endif 363 364 #if !defined(SHARED_LIBBIND) || defined(LIB) 365 /* 366 * If libbind is a shared object (well, DLL anyway) 367 * these externs break the linker when resolv.h is 368 * included by a lib client (like named) 369 * Make them go away if a client is including this 370 * 371 */ 372 __LIBC_HIDDEN__ extern const struct res_sym __p_key_syms[]; 373 __LIBC_HIDDEN__ extern const struct res_sym __p_cert_syms[]; 374 extern const struct res_sym __p_class_syms[]; 375 extern const struct res_sym __p_type_syms[]; 376 __LIBC_HIDDEN__ extern const struct res_sym __p_rcode_syms[]; 377 #endif /* SHARED_LIBBIND */ 378 379 #ifndef ANDROID_CHANGES 380 #define dn_comp __dn_comp 381 #endif 382 #define dn_count_labels __dn_count_labels 383 #define dn_skipname __dn_skipname 384 #define fp_resstat __fp_resstat 385 #define loc_aton __loc_aton 386 #define loc_ntoa __loc_ntoa 387 #define p_cdname __p_cdname 388 #define p_cdnname __p_cdnname 389 #define p_class __p_class 390 #define p_fqname __p_fqname 391 #define p_fqnname __p_fqnname 392 #define p_option __p_option 393 #define p_secstodate __p_secstodate 394 #define p_section __p_section 395 #define p_time __p_time 396 #define p_type __p_type 397 #define p_rcode __p_rcode 398 #define p_sockun __p_sockun 399 #define putlong __putlong 400 #define putshort __putshort 401 #define res_dnok __res_dnok 402 #define res_findzonecut __res_findzonecut 403 #define res_findzonecut2 __res_findzonecut2 404 #define res_hnok __res_hnok 405 #define res_hostalias __res_hostalias 406 #define res_mailok __res_mailok 407 #define res_nameinquery __res_nameinquery 408 #define res_nclose __res_nclose 409 #define res_ninit __res_ninit 410 #define res_nmkquery __res_nmkquery 411 #define res_pquery __res_pquery 412 #define res_nquery __res_nquery 413 #define res_nquerydomain __res_nquerydomain 414 #define res_nsearch __res_nsearch 415 #define res_nsend __res_nsend 416 #define res_nsendsigned __res_nsendsigned 417 #define res_nisourserver __res_nisourserver 418 #define res_ownok __res_ownok 419 #define res_queriesmatch __res_queriesmatch 420 #define sym_ntop __sym_ntop 421 #define sym_ntos __sym_ntos 422 #define sym_ston __sym_ston 423 #define res_nopt __res_nopt 424 #define res_ndestroy __res_ndestroy 425 #define res_nametoclass __res_nametoclass 426 #define res_nametotype __res_nametotype 427 #define res_setservers __res_setservers 428 #define res_getservers __res_getservers 429 #define res_buildprotolist __res_buildprotolist 430 #define res_destroyprotolist __res_destroyprotolist 431 #define res_destroyservicelist __res_destroyservicelist 432 #define res_get_nibblesuffix __res_get_nibblesuffix 433 #define res_get_nibblesuffix2 __res_get_nibblesuffix2 434 #define res_ourserver_p __res_ourserver_p 435 #define res_protocolname __res_protocolname 436 #define res_protocolnumber __res_protocolnumber 437 #define res_send_setqhook __res_send_setqhook 438 #define res_send_setrhook __res_send_setrhook 439 #define res_servicename __res_servicename 440 #define res_servicenumber __res_servicenumber 441 __BEGIN_DECLS 442 int res_hnok(const char *); 443 int res_ownok(const char *); 444 int res_mailok(const char *); 445 int res_dnok(const char *); 446 int sym_ston(const struct res_sym *, const char *, int *); 447 const char * sym_ntos(const struct res_sym *, int, int *); 448 const char * sym_ntop(const struct res_sym *, int, int *); 449 #ifndef ANDROID_CHANGES 450 int b64_ntop(u_char const *, size_t, char *, size_t); 451 int b64_pton(char const *, u_char *, size_t); 452 #endif 453 int loc_aton(const char *, u_char *); 454 const char * loc_ntoa(const u_char *, char *, size_t); 455 int dn_skipname(const u_char *, const u_char *); 456 void putlong(uint32_t, u_char *); 457 void putshort(uint16_t, u_char *); 458 #ifndef __ultrix__ 459 uint16_t _getshort(const u_char *); 460 uint32_t _getlong(const u_char *); 461 #endif 462 const char * p_class(int); 463 const char * p_time(uint32_t); 464 const char * p_type(int); 465 const char * p_rcode(int); 466 __LIBC_HIDDEN__ const char * p_sockun(union res_sockaddr_union, char *, size_t); 467 const u_char * p_cdnname(const u_char *, const u_char *, int, FILE *); 468 const u_char * p_cdname(const u_char *, const u_char *, FILE *); 469 const u_char * p_fqnname(const u_char *, const u_char *, 470 int, char *, int); 471 const u_char * p_fqname(const u_char *, const u_char *, FILE *); 472 const char * p_option(u_long); 473 char * p_secstodate(u_long); 474 int dn_count_labels(const char *); 475 int res_nameinquery(const char *, int, int, const u_char *, 476 const u_char *); 477 int res_queriesmatch(const u_char *, const u_char *, 478 const u_char *, const u_char *); 479 __LIBC_HIDDEN__ const char * p_section(int, int); 480 /* Things involving a resolver context. */ 481 int res_ninit(res_state); 482 int res_nisourserver(const res_state, const struct sockaddr_in *); 483 void fp_resstat(const res_state, FILE *); 484 __LIBC_HIDDEN__ void res_pquery(const res_state, const u_char *, int, FILE *); 485 const char * res_hostalias(const res_state, const char *, char *, size_t); 486 int res_nquery(res_state, const char *, int, int, u_char *, int); 487 int res_nsearch(res_state, const char *, int, int, u_char *, int); 488 int res_nquerydomain(res_state, const char *, const char *, 489 int, int, u_char *, int); 490 int res_nmkquery(res_state, int, const char *, int, int, 491 const u_char *, int, const u_char *, 492 u_char *, int); 493 int res_nsend(res_state, const u_char *, int, u_char *, int); 494 int res_nsendsigned(res_state, const u_char *, int, 495 ns_tsig_key *, u_char *, int); 496 int res_findzonecut(res_state, const char *, ns_class, int, 497 char *, size_t, struct in_addr *, int); 498 int res_findzonecut2(res_state, const char *, ns_class, int, 499 char *, size_t, 500 union res_sockaddr_union *, int); 501 void res_nclose(res_state); 502 __LIBC_HIDDEN__ int res_nopt(res_state, int, u_char *, int, int); 503 void res_send_setqhook(res_send_qhook); 504 void res_send_setrhook(res_send_rhook); 505 __LIBC_HIDDEN__ int __res_vinit(res_state, int); 506 void res_destroyservicelist(void); 507 const char * res_servicename(uint16_t, const char *); 508 const char * res_protocolname(int); 509 void res_destroyprotolist(void); 510 void res_buildprotolist(void); 511 __LIBC_HIDDEN__ const char * res_get_nibblesuffix(res_state); 512 __LIBC_HIDDEN__ const char * res_get_nibblesuffix2(res_state); 513 __LIBC_HIDDEN__ void res_ndestroy(res_state); 514 __LIBC_HIDDEN__ uint16_t res_nametoclass(const char *, int *); 515 __LIBC_HIDDEN__ uint16_t res_nametotype(const char *, int *); 516 __LIBC_HIDDEN__ void res_setservers(res_state, 517 const union res_sockaddr_union *, int); 518 __LIBC_HIDDEN__ int res_getservers(res_state, 519 union res_sockaddr_union *, int); 520 521 __LIBC_HIDDEN__ void res_setnetid(res_state, unsigned); 522 __LIBC_HIDDEN__ void res_setmark(res_state, unsigned); 523 524 // We use the OpenBSD __res_randomid... 525 u_int __res_randomid(void); 526 // ...but NetBSD calls it res_randomid. 527 #define res_randomid __res_randomid 528 529 #ifdef __i386__ 530 # define __socketcall extern __attribute__((__cdecl__)) 531 #else 532 # define __socketcall extern 533 #endif 534 535 __socketcall int __connect(int, const struct sockaddr*, socklen_t); 536 537 #undef __socketcall 538 539 __END_DECLS 540 541 #pragma GCC visibility pop 542 543 #endif /* !_RESOLV_PRIVATE_H_ */ 544